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Microchip Technology 1N4740CPE3/TR8
- Part No.:
- 1N4740CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740CPE3/TR8.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,694
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Product details
Overview
1N4740CPE3/TR8 from Microsemi is a 10 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 25 mA test current, 7 Ω dynamic impedance at IZT, and 0.25 A maximum regulator current at TA = 50°C. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4740CPE3/TR8 datasheet, 1N4740CPE3/TR8 pinout, 1N4740CPE3/TR8 application, or 1N4740CPE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), RoHS-compliant matte-tin plating, tape-and-reel packaging (TR8), and JEDEC-registered 1N4740A-series compatibility.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 10 V reference across a wide current range (0.25 mA to 250 mA), with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its DO-41 axial-leaded plastic package delivers lower thermal resistance than glass-body variants and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
The device features a cathode band polarity indicator, 1.2 V max forward voltage at 200 mA, and is rated for 260 °C soldering (10 s). It is nonsensitive to ESD per MIL-STD-750 Method 1020 and uses void-free UL94V-0 epoxy encapsulation with tin-lead or RoHS-compliant annealed matte-tin terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V ±2% at 25 °C, TL = 25 °C ±8/−2 °C - ensures precise reference accuracy for feedback loops |
| Power Dissipation | 1.0 W at TL < 105 °C (3/8″ lead length) - defines safe continuous operating envelope |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 25 mA - low AC impedance improves regulation stability under varying load |
| Max Regulator Current (IZM) | 0.25 A at TA = 50 °C - sets upper limit for sustained reverse conduction without thermal runaway |
| Thermal Resistance | 45 °C/W junction-to-lead - enables direct thermal path to PCB copper or heatsink via leads |
| Reverse Leakage | 10 μA max at VR = 7.6 V - guarantees minimal standby current in shunt regulation |
| Forward Voltage | 1.2 V max at IF = 200 mA - confirms standard silicon diode conduction behavior in forward bias |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; carries reverse leakage and forward conduction current |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop control vs. standard ±5% (A suffix) parts in precision references |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating, no lead or hazardous substances |
| Tape-and-reel packaging ("TR8") | Standard EIA-296 compliant format for automated SMT placement of axial devices using carrier tape |
| Level 1 moisture sensitivity | No dry pack required prior to assembly - reduces handling cost and process steps |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Shunt-regulated linear power supply for microcontroller peripherals requiring stable 10 V bias. IC Role / Device Role / Timing Role: Zener diode acts as voltage reference and error-sensing element in feedback path of series pass transistor. Use Value: Delivers 10 V ±2% regulation across 5–200 mA load range with <7 Ω dynamic impedance, minimizing output ripple. | Use Scenario: Clamp circuit protecting analog input of ADC against transient surges exceeding 12 V. IC Role / Device Role / Timing Role: Zener diode conducts excess energy to ground when input exceeds 10 V + margin, limiting voltage excursion. Use Value: Withstands 0.25 A peak surge current and maintains clamping within 10 V ±2%, preventing ADC damage. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Undervoltage lockout (UVLO) circuit triggering reset when 12 V rail drops below 10.5 V. IC Role / Device Role / Timing Role: Zener diode biases comparator input to create precise 10 V threshold reference. Use Value: ±2% tolerance ensures UVLO activation at 10.2–10.8 V, meeting tight system-level reset window requirements. | Use Scenario: Level-shifting TTL logic signal to 10 V domain for driving legacy industrial sensors. IC Role / Device Role / Timing Role: Zener diode clamps high-side signal to 10 V while passing logic transitions through series resistor. Use Value: Low 7 Ω ZZT preserves edge integrity; 1.2 V forward drop allows clean low-state transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | Same 10 V nominal, but ±5% tolerance (A suffix) instead of ±2% (C suffix) | Less suitable for precision references; acceptable for general-purpose clamping where 10 V ±0.5 V is sufficient | Select 1N4740A only if tighter tolerance is unnecessary and cost is primary concern |
| BZX55C10 | 10 V ±5%, 500 mW rating, DO-35 package, higher ZZT (~20 Ω) | Lower power handling limits use in >125 mA applications; smaller DO-35 footprint may constrain thermal design | Choose BZX55C10 only for space-constrained, low-power designs where 500 mW suffices |
Compared with 1N4740A and BZX55C10, the 1N4740CPE3/TR8 offers superior precision (±2%), higher power (1 W), lower dynamic impedance (7 Ω), and tape-and-reel readiness - making it optimal for production-grade industrial references requiring repeatability and thermal robustness.
Availability
1N4740CPE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, and embedded system voltage monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N4740CPE3/TR8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for ruggedized, JEDEC-standard Zener regulation in harsh-environment power systems - emphasizing thermal stability, ESD immunity, and moisture resilience.
FAQ
What is the Zener voltage tolerance of the 1N4740CPE3/TR8?
The 1N4740CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its measured VZ falls between 9.8 V and 10.2 V at 25 °C with 25 mA test current. This tighter tolerance supports precision voltage references where standard ±5% parts like the 1N4740A would introduce excessive error.
Is the 1N4740CPE3/TR8 RoHS compliant?
Yes, the 1N4740CPE3/TR8 is RoHS compliant, confirmed by the "e3" suffix in its designation. It uses annealed matte-tin plating on its axial leads and void-free UL94V-0 epoxy encapsulation, meeting EU Directive 2011/65/EU requirements with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE.
What does the "TR8" suffix indicate in 1N4740CPE3/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape width. This format enables automated pick-and-place assembly of the axial-leaded DO-41 device. The "TR" denotes tape-and-reel; "8" specifies tape width - distinct from bulk or ammo-pack options.
What is the maximum steady-state power dissipation for the 1N4740CPE3/TR8?
The 1N4740CPE3/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) < 105 °C with 3/8″ (10 mm) lead length from body, or at ambient temperature (TA) < 45 °C when mounted on FR4 with specified copper pad geometry. Derating applies above these temperatures per Figure 1 in the datasheet.
How is polarity identified on the 1N4740CPE3/TR8?
Polarity is identified by a visible cathode band on the DO-41 package body - the banded end is the cathode and must be connected to the higher-potential node during Zener operation. In forward bias, the banded end is negative. This marking complies with JEDEC standards and is laser-etched or molded into the epoxy body.
1N4740CPE3/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4740CPE3/TR8 FAQ
1.How can I place an order for 1N4740CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740CPE3/TR8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4740CPE3/TR8 reliable?
The price and inventory of 1N4740CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4740CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740CPE3/TR8?
1N4740CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740CPE3/TR8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4740CPE3/TR8?
For technical support, including 1N4740CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4740CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4740CPE3/TR8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4740CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4740CPE3/TR8?
All 1N4740CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740CPE3/TR8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4740CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4740CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740CPE3/TR8 Tags
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MMBZ5240B-7-F
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